Solid Nodule

Fleischner Guidelines

• Note.—Newly detected indeterminate nodule in persons 35 years of age or older.
  
• *  Average of length and width.
  
• †  Minimal or absent history of smoking and of other known risk factors.
  
• ‡  History of smoking or of other known risk factors.
  
• § The risk of malignancy in this category (<1%) is substantially less than that in a baseline CT scan of an asymptomatic smoker.
  
• ∥  Nonsolid (ground-glass) or partly solid nodules may require longer follow-up to exclude indolent adenocarcinoma.